Halotolerant Plant Growth-Promoting Rhizobacteria Isolated From Saline Soil Improve Nitrogen Fixation and Alleviate Salt Stress in Rice Plants

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Khumairah F. H., Setiawati M. R., Fitriatin B. N., Simarmata T., Alfaraj S., Ansari M. J., ...Daha Fazla

FRONTIERS IN MICROBIOLOGY, cilt.13, 2022 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 13
  • Basım Tarihi: 2022
  • Doi Numarası: 10.3389/fmicb.2022.905210
  • Dergi Adı: FRONTIERS IN MICROBIOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, BIOSIS, CAB Abstracts, EMBASE, Veterinary Science Database, Directory of Open Access Journals
  • Anahtar Kelimeler: halotolerant, PGPR, salinity, nitrogen fixation, salt stress, climate change, ENTEROBACTER SP., TOLERANCE, BACTERIA, IDENTIFICATION, TOOLS, WHEAT
  • Van Yüzüncü Yıl Üniversitesi Adresli: Evet

Özet

Salinity is one of the most damaging abiotic stresses due to climate change impacts that affect the growth and yield of crops, especially in lowland rice fields and coastal areas. This research aimed to isolate potential halotolerant plant growth-promoting rhizobacteria from different rhizo-microbiome and use them as effective bioinoculants to improve rice growth under salinity stress conditions. Bioassay using rice seedlings was performed in a randomized block design consisting of 16 treatments (control and 15 bacterial isolates) with three replications. Results revealed that isolates S-3, S-5, and S-6 gave higher shoot height, root length, and plant dry weight compared with control (without isolates). Based on molecular characteristics, isolates S-3 and S-5 were identified as Pseudomonas stutzeri and Klebsiella pneumonia. These isolates were able to promote rice growth under salinity stress conditions as halotolerant plant growth-promoting rhizobacteria. These three potent isolates were found to produce indole-3-acetic acid and nitrogenase.